Dynamic Context Logic and its Application to Norm

Abstract

Building on a simple modal logic of context, the paper presents a dynamic
logic characterizing operations of contraction and expansion on theories.
We investigate the mathematical properties of the logic, and use it to develop an
axiomatic and semantic analysis of norm change in normative systems. The proposed
analysis advances the state of the art by providing a formal semantics of
norm-change which, at the same time, takes into account several different aspects
of the phenomenon, such as permission and obligation dynamics, as well as the
dynamics of classificatory rules.